If you have ever wanted to build your own portable speaker or add sound to a custom arcade cabinet, you have likely come across a tiny green board labeled
| Symptom | Likely Cause | Solution | |---------|---------------|----------| | No sound, IC hot | Short on speaker output | Check that neither speaker wire touches ground or VCC | | Distorted sound at low volume | Input voltage too low (<2.5V) or audio source clipping | Use stable 5V supply; reduce source volume | | Popping noise on power-up | Lack of output RC snubber | Add 1µF capacitor in parallel with each speaker (optional) | | One channel silent | Broken PCB trace or bad IC | Swap L and R inputs to test; check solder joints | | Amplifier shuts down intermittently | Overheating or supply droop | Add heatsink or reduce volume; check power supply current rating (needs at least 1A for 2×3W) |
| Parameter | Value | |-----------|-------| | | PAM8403 (most common) or NS4150 (less common) | | Amplifier Class | Class-D (filterless) | | Output Power | 3W per channel into 4Ω load (at 5V, 10% THD) | | Typical Efficiency | 85-90% | | Supply Voltage | 2.5V – 5.5V DC | | Quiescent Current | ~8mA (no load) | | Shutdown Current | <1µA | | Load Impedance | 4Ω – 8Ω | | THD+N | 0.1% (1W, 4Ω, 5V) | | Signal-to-Noise Ratio | 87dB | | Channel Separation | 75dB | | Operating Temperature | -40°C to +85°C | | PCB Size | Approx. 23mm x 18mm | hw-104 amplifier datasheet
| Parameter | Symbol | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | Supply Voltage | Vcc | - | 18 | V DC | | Output Peak Current | Io | - | 2 | A | | Power Dissipation (Tc=70°C) | Ptot | - | 20 | W | | Operating Junction Temp | Tj | -40 | 150 | °C | | Storage Temperature | Tstg | -55 | 150 | °C |
The module typically features a simple 9-pin interface for easy integration. If you have ever wanted to build your
Remember to respect the BTL output configuration, keep the supply voltage below 5.5V, and provide adequate decoupling. With these precautions, the HW-104 delivers clean, efficient audio amplification for countless DIY applications.
Greater than 90% at full power, eliminating the need for bulky external heatsinks. Load Impedance Compatible: 4Ω to 8Ω audio speakers. Signal-to-Noise Ratio (SNR): for clear background suppression. With these precautions, the HW-104 delivers clean, efficient
DC 2.5V to 5.5V (Ideal for 5V USB or single-cell Li-ion batteries).
In the world of DIY electronics and audio prototyping, the has become a familiar sight. Often sold as a compact breakout board, this module is widely available through online retailers like Amazon, eBay, and AliExpress. However, finding a centralized, detailed HW-104 amplifier datasheet can be challenging, as the module is frequently rebranded or sold without official documentation from a major semiconductor manufacturer.
If you have ever wanted to build your own portable speaker or add sound to a custom arcade cabinet, you have likely come across a tiny green board labeled
| Symptom | Likely Cause | Solution | |---------|---------------|----------| | No sound, IC hot | Short on speaker output | Check that neither speaker wire touches ground or VCC | | Distorted sound at low volume | Input voltage too low (<2.5V) or audio source clipping | Use stable 5V supply; reduce source volume | | Popping noise on power-up | Lack of output RC snubber | Add 1µF capacitor in parallel with each speaker (optional) | | One channel silent | Broken PCB trace or bad IC | Swap L and R inputs to test; check solder joints | | Amplifier shuts down intermittently | Overheating or supply droop | Add heatsink or reduce volume; check power supply current rating (needs at least 1A for 2×3W) |
| Parameter | Value | |-----------|-------| | | PAM8403 (most common) or NS4150 (less common) | | Amplifier Class | Class-D (filterless) | | Output Power | 3W per channel into 4Ω load (at 5V, 10% THD) | | Typical Efficiency | 85-90% | | Supply Voltage | 2.5V – 5.5V DC | | Quiescent Current | ~8mA (no load) | | Shutdown Current | <1µA | | Load Impedance | 4Ω – 8Ω | | THD+N | 0.1% (1W, 4Ω, 5V) | | Signal-to-Noise Ratio | 87dB | | Channel Separation | 75dB | | Operating Temperature | -40°C to +85°C | | PCB Size | Approx. 23mm x 18mm |
| Parameter | Symbol | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | Supply Voltage | Vcc | - | 18 | V DC | | Output Peak Current | Io | - | 2 | A | | Power Dissipation (Tc=70°C) | Ptot | - | 20 | W | | Operating Junction Temp | Tj | -40 | 150 | °C | | Storage Temperature | Tstg | -55 | 150 | °C |
The module typically features a simple 9-pin interface for easy integration.
Remember to respect the BTL output configuration, keep the supply voltage below 5.5V, and provide adequate decoupling. With these precautions, the HW-104 delivers clean, efficient audio amplification for countless DIY applications.
Greater than 90% at full power, eliminating the need for bulky external heatsinks. Load Impedance Compatible: 4Ω to 8Ω audio speakers. Signal-to-Noise Ratio (SNR): for clear background suppression.
DC 2.5V to 5.5V (Ideal for 5V USB or single-cell Li-ion batteries).
In the world of DIY electronics and audio prototyping, the has become a familiar sight. Often sold as a compact breakout board, this module is widely available through online retailers like Amazon, eBay, and AliExpress. However, finding a centralized, detailed HW-104 amplifier datasheet can be challenging, as the module is frequently rebranded or sold without official documentation from a major semiconductor manufacturer.